Patents by Inventor Xiao-Na Xu

Xiao-Na Xu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Gumball machine
    Patent number: D499146
    Type: Grant
    Filed: December 22, 2003
    Date of Patent: November 30, 2004
    Assignee: Balyun Limited
    Inventors: Yong Liu, Xiao-Na Xu, Lok-Chun Chan